Add Yahoo as a preferred source to see more of our stories on Google. Biofire's gun is designed to allow an authorized person to fire the weapon instantly upon gripping it, and to disable the trigger ...

The company behind America's first biometric "smart gun" — one that fires only when gripped by authorized users — will face a crucial test in the coming weeks. After decades of failed attempts by ...

At a firing range in an industrial section of Broomfield, Colorado, near Denver, Kai Kloepfer loads a 9-millimeter pistol and pulls the trigger. There's a loud bang and a new hole in the paper target.